In the wake of the revelations, Australian tennis authorities boosted measures to fight corruption.

They included having anti-corruption officers at all sanctioned events, a block on accessing gambling websites via public wifi at tournaments, and bolstering its National Integrity Unit.

Ann West, head of the integrity unit, said much had been done to address the problem since the scandal broke last year.

“My first reaction was disappointment, to be honest. Whilst we understand that we’ll always fight the battle I would have anticipated the message was getting out there,” she told the Australian Broadcasting Corporation.

“We’re realists, we have to continue and will increase our education opportunities with our players,” she added. “We have zero tolerance to match-fixing. That’s our mantra.”

Neil Paterson, assistant commissioner of Victoria Police, said targeting match-fixers and illegal betting was a key focus of authorities heading into the Australian Open which gets under way on January 16.

“Match-fixing is one of the fastest growing organised crime types across the world at the present time,” he warned.